Oil Cooler; Spark Plugs - Kohler 18RESNT Operation

3. Fill with oil.
a. Fill the engine to the F mark on the dipstick. The
engine oil capacity is approximately 2.8 L
(3.0 qt.). See Section 4.3.3, Engine Oil
Recommendation, for oil selection.
b. Reinstall the dipstick and the oil fill cap.
c. Check that the generator set master switch is in
the OFF position.
d. Reconnect the generator set engine starting
battery, negative (--) lead last.
e. Reconnect the power to the battery charger.
f. Start and run the generator set for a minute to
allow the oil pressure to reach operating range.
g. Stop the generator set, wait 1 minute, and then
recheck the oil level. Add oil to bring the level
up to the F mark on the dipstick.
4. Check for leaks.
a. Check for oil leaks.
b. Fix leaks and recheck the oil level.
c. Reinstall the housing side panel.
4.3.5

Oil Cooler

Inspect and clean the oil cooler at the intervals indicated
in the service schedule. The oil cooler must be kept free
of debris.
See Figure 4-2 for the oil cooler location. The oil cooler
is located under the No. 2 cylinder shroud. Remove the
top mounting screw and loosen the two side screws,
then lift off the cylinder shroud.
1. Oil cooler
Figure 4-2 Oil Cooler Location
36 Section 4 Scheduled Maintenance, 17/18 kW Models
Clean the outside of the oil cooler fins with a brush or
with compressed air.

4.4 Spark Plugs

Check the spark plugs at the intervals shown in the
service schedule in Section 4.2. Reset the spark plug
gap or replace the plugs with new plugs as necessary.
Replace the spark plugs at the intervals shown in the
service schedule in Section 4.2.
Figure 4-3 Checking the Spark Plug Gap
Figure 4-4 Adjusting the Spark Plug Gap
1
62 590 01
1. Clean the area around the base of the spark plug to
keep dirt and debris out of the engine.
2. Remove the spark plug and check its condition.
Replace the spark plug if it is worn or if its reuse is
questionable.
3. Check the spark plug gap using a wire feeler
gauge. Adjust the gap to 0.76 mm (0.030 in.) by
carefully bending the ground electrode.
Figure 4-3 and Figure 4-4.
4. Reinstall the spark plug into the cylinder head.
Torque the spark
(18--22 ft. lb.)
See
plug to 24.4--29.8 Nm
1--514
1--511
TP-6517 4/09